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How working time, period of availability (POA) and breaks differ under the Road Transport (Working Time) Regulations 2005, and why it matters.
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Working time, period of availability (POA) and break are three different things, and the difference decides whether time spent during a shift counts towards a driver’s working time limits. They are easy to mix up because they can all look like “not driving” - but they are recorded differently and treated differently.
In plain terms:
Get the classification right and the records are accurate. Get it wrong - most often by logging genuine waiting time as “other work”, or by treating availability as if it were a proper break - and you either inflate a driver’s working time on paper or leave a break requirement unmet.
These rules sit in the Road Transport (Working Time) Regulations 2005.
The quickest way to keep them straight is to ask three questions of any block of time: is the driver doing work, must they stay available, and did they know the wait was coming?
Working time
Period of availability (POA)
Break
The Working Time Regulations cap how much working time a mobile worker can do - not how long their shift is. Breaks, rest and POA are specifically excluded from the calculation of working time (regulation 5).
So the line between the three categories is not academic. It changes the numbers DVSA and your own analysis software work from:
The 48-hour figure is an average over a fixed 17-week reference period - which can be extended to 26 weeks by a collective or workforce agreement - so a small mis-classification doesn’t stay small. An hour wrongly counted as work each day compounds across the period.
Two practical failure modes follow:
On a digital tachograph this comes down to the mode switch: driving is recorded automatically, but the driver chooses between other work, availability and break/rest for everything else. The setting they pick is the record.
Working time is the time a mobile worker spends carrying out their duties for the employer. If the driver cannot freely dispose of their time and has to be at their workstation getting on with the job, it is working time.
It includes:
That last point catches people out, so it has its own section below under POA. Non-transport work done for the same employer - warehouse or yard work, for example - also counts as working time for these Regulations.
A POA is a waiting time the driver knew about in advance, during which they are not tied to their workstation but must remain available to answer a call to start or resume driving or other work.
For a period to count as a POA, all of the following must be true:
Typical examples include:
This is where most POA mistakes happen. The wait only counts as a POA if the driver knew, before it began, roughly how long it would last.
If a driver pulls onto a customer’s site and is told “you’re booked in, it’ll be about an hour before we tip you”, that hour can be a POA. If they arrive and simply join a queue with no idea whether they’ll be there ten minutes or three hours, that waiting is working time, not a POA - because the foreseeable duration was not known in advance.
It is easy to over-claim availability. The following are working time, not periods of availability:
If in doubt, the test is simple: did the driver know in advance roughly how long, and are they genuinely free of work? If the answer to either is no, it’s working time.
Loading and unloading is the scenario this question turns on most often, because it can fall either way depending on what the driver is actually doing.
The deciding factors are whether the driver is free of work and whether the wait was foreseeable - not whether the vehicle happens to be stationary.
A POA keeps waiting time out of the working time total, but people often assume it does two further things, and it does neither:
So a driver can sit in a ferry queue logging a POA and still owe themselves a 45-minute driving break before they next reach 4.5 hours at the wheel.
This is usually the real reason waiting time gets mis-recorded. The Regulations only govern how many hours count as working time - they say nothing about pay. Whether a POA is paid, and at what rate, is entirely a matter of the driver’s contract and the operator’s policy.
It’s worth being clear with drivers about this. A driver who fears losing pay may record genuine availability as “other work” to protect their wages - which quietly inflates the working time figures and can trigger infringements that never really happened. Pay and working time are separate questions; settle the pay policy so the records can be honest.
There is one situation the Regulations settle directly. Where a driver is part of a crew, time spent travelling in - but not driving - a moving vehicle is a POA for that driver (regulation 6(2)), provided they are not doing other work such as navigating.
A break, for working time purposes, is a period during which the mobile worker may not carry out any work and can use the time freely. The break rules are triggered by how much working time has been done, not by the length of the shift.
The requirements are:
A break can be taken during a POA - for instance, a genuine 20-minute break in the middle of a known two-hour wait - but it must be recorded separately as a break, not left lumped in as availability.
Break and rest are different things, and readers often merge them. A break is a short interruption to working time during the day (the 30/45-minute requirements above). Rest means the daily and weekly rest periods - broadly, the 11 hours between shifts and the 45 hours across the week under the drivers’ hours rules. Both sit outside working time, but they answer different questions: a break interrupts the working day; rest separates one working day or week from the next.
There are two break regimes, and they are not the same thing:
When the driver is driving, the drivers’ hours break requirement takes precedence. In practice, for work that is mostly driving, the breaks taken to satisfy the drivers’ hours rules will usually cover the working-time break requirement as well. Where a shift contains a lot of non-driving work, the working-time break requirement can bite separately, so it is worth checking both.
If a mobile worker does any work during night time, their working time must not exceed 10 hours in that 24-hour period (regulation 9). As with the weekly limits, POA and breaks don’t count towards the 10 hours.
Night time is defined as:
The 10-hour limit can be relaxed by a collective or workforce agreement - for example, to allow planned 12-hour night shifts. The trap is the same one: an hour of waiting mis-recorded as work can tip a night shift over the limit on paper when it was actually compliant.
On a digital tachograph the driver sets the mode switch to one of three manual activities (driving records itself):
The golden rule: only set availability when the wait genuinely meets the POA test, and only set break/rest when the driver is doing no work and is free. Recording the right activity at the right time is what keeps the working time figures honest - and what makes infringements easy to spot and explain.
Two practical points:
If a driver works for more than one employer, their working time is the combined total across all of them - you can’t look at each job in isolation. The driver must tell each employer, in writing, about the time worked for the other(s), and each employer must include it in the calculation (regulation 10). This matters for agency drivers and anyone with a second driving job: the 48-hour average and 60-hour week apply to the person, not the post.
Here is a single day, to show how the categories play out. Times are illustrative.
The shift spans 10 hours, but the working time is less:
Two things to take from it:
And if the customer hadn’t told the driver the wait in advance - if they’d simply joined a queue of unknown length - that hour would correctly be working time, not a POA.
Most working-time disputes come down to a handful of mis-set activities adding up over a reference period. Consistent, correctly-classified tachograph records are the whole game - and analysing them properly, so that genuine POAs aren’t counted as work and unmet breaks are caught early, is exactly the burden Tacho Agent takes off operators. For the wider picture of how working time fits together, see the pillar guide.
This article is provided for general guidance only and reflects our understanding of the rules as they apply in Great Britain as at the date shown on this page. It is not legal advice and should not be relied on as a substitute for advice tailored to your specific operation.
Drivers' hours, tachograph, working time and operator licensing rules are detailed and change over time, and some requirements differ in Northern Ireland and for international journeys. Always check the current guidance on GOV.UK and the underlying legislation on legislation.gov.uk, and consult your transport manager or a qualified compliance professional before acting.
To the fullest extent permitted by law, Tacho Agent Ltd accepts no liability for any loss arising from action taken, or not taken, in reliance on this article. Nothing here excludes or limits any liability that cannot lawfully be excluded, including for death or personal injury caused by negligence or for fraud. Use of this article is also governed by our Terms of Use.
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